/Engine/Plugins/Runtime/MassGameplay/Source/MassRepresentation/Public/MassRepresentationSubsystem.h
Cancel spawning request that is matching the TemplateActorIndex
True if spawning request was canceled
bool CancelSpawning ( const [FMassEntityHandle](API\Plugins\MassEntity\FMassEntityHandle) MassAgent, const int16 TemplateActorIndex, [FMassActorSpawnRequestHandle](API\Plugins\MassActors\FMassActorSpawnRequestHandle) & SpawnRequestHandle )